<?hh <<__EntryPoint>> function main(): void {
$ar = darray[];
for ($count = 0; $count < 10; $count++) {
    $ar[$count]        = "$count";
    @$ar[$count]['idx'] = "$count";
}

for ($count = 0; $count < 10; $count++) {
    echo $ar[$count]." -- ".@$ar[$count]['idx']."\n";
}
$a = "0123456789";
$a[9] = $a[0];
var_dump($a);
}
